I thought we had pointed to What is Going on at the Library of Congress? [pdf] but I could be wrong. In any case, Steven Chabot has written A summary and commentary of Thomas Mann's "What's Going on at the Library of Congress?"Both pieces are worth a read. Chabot focuses on 2 of Mann's points, A move to abandoning the LC system of headings (essentially leaving categorization to Google-like keyword searches and Amazon-like user recommendations) and
To accept digital copies of those works not "born digital", i.e. books, in place of their paper representation on a physical shelf.